CN210874444U

CN210874444U - Tail gas outlet device of cold hydrogenation reactor

Info

Publication number: CN210874444U
Application number: CN201921460408.1U
Authority: CN
Inventors: 李建设; 张戈; 铁雷雷
Original assignee: Henan Guiwan Technology Development Co ltd
Current assignee: Henan Guiwan Technology Development Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-06-30
Anticipated expiration: 2029-09-04

Abstract

The utility model relates to a tail gas outlet device of cold hydrogenation reactor, including the outlet duct, the outlet duct is the hollow tubular structure in inside, and its upper end is provided with the gas outlet, and lower extreme fixedly connected with seal lid, the intermediate position is bulging outwards and is formed with circular cushion chamber, the center department in cushion chamber inside is provided with circular baffle, the outside of baffle is evenly fixed and is provided with a plurality of connecting rods to be connected with the inner wall fixed connection of cushion chamber through the connecting rod, the outward surface of outlet duct lower extreme personally submits the annular and is provided with a plurality of air inlets, the air inlet is rectangular form, its length direction with the length direction of outlet duct is unanimous, and its width of air inlet from the centre to both sides increases gradually; the utility model has the advantages of reasonable structure and good separation effect.

Description

Tail gas outlet device of cold hydrogenation reactor

Technical Field

The utility model belongs to the technical field of polycrystalline silicon production, concretely relates to tail gas outlet device of cold hydrogenation reactor.

Background

In recent years, the contradiction between the increasing demand for energy and the decreasing non-renewable energy of human beings is continuously intensified, and the development and utilization of renewable energy are promoted; solar energy is a new renewable energy source which is rich and clean and is widely concerned by people; in solar energy utilization, polycrystalline silicon plays a great role; polycrystalline silicon is an important raw material of semiconductors, large-scale integrated circuits and solar energy industries, and has a hot tide of a polycrystalline silicon project in China under the support of the strong popularization of new energy policies by central governments and the induction of huge profits in solar photovoltaic industry markets, the polycrystalline silicon industry markets are short of supply and demand, the development prospect is wide, and China enters the golden period of the rapid development of the polycrystalline silicon industry;

in the process of preparing the polysilicon by reducing trichlorosilane by hydrogen, a large amount of byproduct silicon tetrachloride is generated, the silicon tetrachloride has moderate toxicity, is decomposed and releases heat when being heated or meeting water, toxic corrosive smoke is emitted, if effective comprehensive treatment and application cannot be obtained, the environment can be greatly polluted, and the overall economic and technical level of the polysilicon production process is reduced; the hydrogenation of silicon tetrachloride to convert into trichlorosilane, which is a basic raw material for producing polysilicon, is one of important ways for the comprehensive utilization of trichlorosilane, but in the hydrogenation process of silicon tetrachloride, tail gas containing silicon powder enters a tail gas outlet pipeline at a high speed, which is not beneficial to the separation of silicon powder and gas, easily causes resource waste, and the high-speed impact of high-hardness silicon powder can cause serious abrasion to the pipeline; therefore, in order to solve the above problems, it is necessary to develop a tail gas outlet device of a cold hydrogenation reactor with reasonable structure and good separation effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing a tail gas outlet device of a cold hydrogenation reactor which has reasonable structure and good separation effect.

The purpose of the utility model is realized like this: the utility model provides a cold hydrogenation reactor's tail gas outlet device, includes the outlet duct, the outlet duct is inside hollow tubular structure, and its upper end is provided with the gas outlet, and lower extreme fixedly connected with seals lid, and the intermediate position is formed with the circular shape cushion chamber to the outside protrusion, the inside center department of cushion chamber is provided with the circular shape baffle, the outside of baffle is evenly fixed and is provided with a plurality of connecting rods to inner wall fixed connection through connecting rod and cushion chamber, the outward surface of outlet duct lower extreme is personally submitted the annular and is provided with a plurality of air inlets, the air inlet is rectangular form, its length direction with the length direction of outlet duct is unanimous mutually, and the air inlet is by middle its width crescent to both sides.

The diameter of the buffer cavity is twice of that of the air outlet pipe.

The diameter of the baffle is the same as the inner diameter of the air outlet pipe, and the thickness of the baffle is half of that of the buffer cavity.

The number of the connecting rods is four, and the four connecting rods are symmetrically and uniformly fixedly arranged around the baffle plate.

Two side walls of the air inlet are in an isosceles triangle shape; or the two side walls of the air inlet are in arc shapes.

The utility model has the advantages that: the utility model has the advantages that the plurality of air inlets are arranged on the outer surface of the lower end of the air outlet pipe, the air inlets are in the shape of long strips, the width of the air inlets is gradually increased from the middle to two sides, and by adopting the structure, the silicon powder in the mixed gas can be blocked through the air inlets, so that the silicon powder carried in the mixed gas is separated from the gas for the first time when the mixed gas enters the air outlet pipe through the air inlets; meanwhile, the utility model discloses a set up the cushion chamber in the intermediate position of outlet duct, the center department of cushion chamber inside sets up the baffle, and the baffle passes through the inner wall fixed connection of connecting rod and cushion chamber, adopt this structure, can carry out the secondary to the gas mixture that gets into the outlet duct inside and block, utilize the baffle to make silica flour and the gas that carry in the gas mixture carry out the secondary separation, adopt the mode of secondary separation, increase the thoroughness of separation between silica flour and the gas, solved in the process of silicon tetrachloride hydrogenation, current tail gas outlet pipeline is unfavorable for the separation of silica flour and gas, cause the waste of resource easily, and the problem of serious abrasion can be caused to the pipeline to the silica flour of high rigidity under the high-speed impact; generally, the utility model has the advantages of rational in infrastructure and separation effect are good.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a cross-sectional view of the front view of the present invention.

Fig. 3 is a cross-sectional view of the lower end plan view of the middle outlet pipe of the present invention.

In the figure: 1. an air outlet pipe 11, an air outlet 12, a buffer cavity 13, an air inlet 2, a sealing cover 3, a baffle 4 and a connecting rod.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Example (b): as shown in fig. 1, 2 and 3, a tail gas outlet device of a cold hydrogenation reactor comprises an outlet pipe 1, wherein the outlet pipe 1 is of a hollow tubular structure, an air outlet 11 is arranged at the upper end of the outlet pipe, a sealing cover 2 is fixedly connected at the lower end of the outlet pipe, a circular buffer cavity 12 is formed in the middle position of the outlet pipe in a protruding mode towards the outside, the diameter of the buffer cavity 12 is twice of that of the outlet pipe 1, a circular baffle 3 is arranged at the center of the inner part of the buffer cavity 12, the diameter of the baffle 3 is the same as the inner diameter of the outlet pipe 1, the thickness of the baffle 3 is half of that of the buffer cavity 12, four connecting rods 4 are symmetrically and uniformly and fixedly arranged outside the baffle 3 and fixedly connected with the inner wall of the buffer cavity 12 through the connecting rods 4, a plurality of air inlets 13 are annularly arranged on the outer surface of the lower end of the outlet pipe 1, the air inlets, the width of the air inlet 13 is gradually increased from the middle to two sides, and two side walls of the air inlet 13 are in an isosceles triangle shape; or two side walls of the air inlet 13 are arc-shaped.

When the utility model is used, firstly, the mixed gas containing silicon powder enters the outlet pipe 1 through the air inlet 13 at high speed, at the moment, the silicon powder in the mixed gas is blocked by the air inlet 13, so that when the mixed gas enters the outlet pipe 1 through the air inlet 13, the silicon powder carried by the mixed gas is separated from the gas for the first time, then, when the mixed gas passes through the buffer groove 12 in the outlet pipe 1, the mixed gas entering the outlet pipe 1 can be blocked for the second time by the baffle 3, so that the silicon powder carried by the mixed gas is separated from the gas for the second time when contacting with the baffle 3, and finally, the tail gas after the secondary separation is discharged through the air outlet 11 on the outlet pipe 1, the utility model adopts the mode of secondary separation, increases the thoroughness of separation between the silicon powder and the gas, solves the problem that in the process of silicon tetrachloride hydrogenation, the existing tail gas outlet pipe 1 is not beneficial to the separation of the, the waste of resources is easily caused, and the high-hardness silicon powder can cause serious abrasion to the pipeline under high-speed impact; meanwhile, the width of the middle air inlet 13 of the utility model is gradually increased from the middle to the two sides, and by adopting the structure, the silicon powder in the mixed gas can be blocked and separated to the maximum extent while the mixed gas is prevented from entering the outlet pipe 1; generally, the utility model has the advantages of rational in infrastructure and separation effect are good.

Claims

1. The utility model provides a tail gas outlet device of cold hydrogenation ware, includes the outlet duct, its characterized in that: the utility model discloses a gas outlet pipe, including the outlet duct, the outlet duct is inside hollow tubular structure, and its upper end is provided with the gas outlet, and the sealed lid of lower extreme fixedly connected with, the intermediate position is formed with the circular shape cushion chamber to the outside protrusion, the inside center department of cushion chamber is provided with the circular shape baffle, the outside of baffle is evenly fixed and is provided with a plurality of connecting rods to inner wall fixed connection through connecting rod and cushion chamber, the outward appearance of outlet duct lower extreme personally submits the annular and is provided with a plurality of air inlets, the air inlet is rectangular form, its length direction with the length direction of outlet duct is unanimous, and the air inlet is.

2. The cold hydrogenation reactor off-gas outlet device of claim 1, wherein: the diameter of the buffer cavity is twice of that of the air outlet pipe.

3. The cold hydrogenation reactor off-gas outlet device of claim 1, wherein: the diameter of the baffle is the same as the inner diameter of the air outlet pipe, and the thickness of the baffle is half of that of the buffer cavity.

4. The cold hydrogenation reactor off-gas outlet device of claim 1, wherein: the number of the connecting rods is four, and the four connecting rods are symmetrically and uniformly fixedly arranged around the baffle plate.

5. The cold hydrogenation reactor off-gas outlet device of claim 1, wherein: two side walls of the air inlet are in an isosceles triangle shape;

or the two side walls of the air inlet are in arc shapes.